Ed ward weston



(No Model.) 3 Sheets-Sheet 1.

E. WESTON.

BLBGTRIG ABG LAMP.

No. 267,474. Patented Nov. 14, 1882.

(No Model.) 8 sheets-sheez 2. E. WESTON.

ELECTRIC ARC LAMP.

No. 267,474. Patented Nov. 14, 1882.

(No Model.) 3 Sheetsf-Sheet 8.'

' E. WESTON.

ELECTRIC ARC LAMP.

No. 267,474. Patented Nov. 14, 1882l UNITED STATES PATENT OFFICE.-

EDWARD IVESTON, OF NEVVRK, NEV JERSEY, ASSIGNOR TO THE UNITED STATES ELECTRIC LIGHTING COMPANY, OF NEWr YORK, N. Y.

ELEoTRic-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 267,474, dated November 14, 1882.

Application filed February 1, 1882.

To all u'hom it may concern:

Be it known that I, EDWARD WEs'roN, a subject of the Queen of Great Britain, and resident of Newark, in the county of EsseX and State of New Jersey, have invented certain new and useful Iinprovements in Electric.

Lamps, of which the following is a specification, reference being had to the drawings acconipanying and forming a part of the same. io My present invention relates to electric-are I lamps, employing, in conjunction with a single set of feed-regulating magnets, two sets or pairs of carbon pencils, and independent feeding devices connected therewith, which, by the consumption of the carbons,- are brought successivelyunder the controlling influence of the aforesaid magnets.

In the lamps constructed according to my invention the carbons are fed and adjusted zo through the i'nstrumentaiity of elutch mechanism of the kind described by me in former applications, and consisting essentialiy ofa plate or bar connected at one end to the niovable armature 01' its equivalent and restin g at the other end upon the stationary lamp-frame.

The said plate or bar is perforated -and surrounds the carbon-carrier. It' the armature be raised and the plate connected therewith tilted a short distance, it grips the carrier, so

that the position of the latter depends upon the elevation of the armature.

In the construction ofmy lamp, I have taken advantage of the fact that a definite tilt or inclination must be imparted to the clamp bei'ore it grips the carbon-carrier by allowing one of the clamps to remain in its normal position, while a block or plate is inserted between the free end of the other and the lamp-frame, by which the clamp is tilted in a reverse di- 40 rection as far as can be done without moving the carrier. Under these conditions the clarnp could only raise its carrier by being tilted to 'a position to which the armature could bring it only by being raised beyond its normal range of motion. The armature will not be sensibly affected by this clamp therefore, while the other will be caused to perform its normal functions. Both carriers are in electrical contact with the frame of the lamp to which the (No model.)

i current is brought, so that the circuit will be between the positive and negative lamp-terminals, through whichever pair of carbons may be in contact or between which the are is formed. In order to regulate this, the carbons that are designed to be consuined last are separated by a catch which holds the upper carbon a short distance from the other.

To withdraw the plate from the clamp and to release the catch above mentioned, and allow the second set of carbons to ignite when the fii'st p'air has been consumed, I employ an electro-magnetin a cireuit arranged to be closed by an adjnstable stop on the carboncarrier of the first pair, and a shifting-lever of peenliar construction, the character and arrangement of which will be readily understood by reference to the annexed drawings, in which- Figure 1 shows in side elevation the working parts of my improved lamp; Fig. i), a side elevation at right angles to Fig. l, a portion of the supporting-base being omitted, and the electro-magnets shown in dotted lines. Fig.

3 is aplan and part sectional view of the above; Fig. 4, a perspective of the clutch mechanisin detached; Fig. 5, a diagrammatic illustration of the arrangement of circuits.

Similar letters ot' reference indicate corresponding parts in the several figures. v

Upon plate C are fixed the now well-know mechanismsemployedbymeintheconstruction of electriclainps, to wit: a bipolar magnet, D D, supported by standard A and wound with two sets of coils in opposite directions, one in the main or lamp circuit, the other in a shunt about the lamp; an armature, 'D', in face of said magnets and supported by flat springs c, secured by a standard, B, a tension device for regulating the armature, and a dash-pot, P, for precluding sudden movcment or vibration in the moving parts. This form of lainp-regulator, it is to be observed, is einployed in this case only in illustration of the invention, as it may be varied in a great number of ways and many other forms used in its stead.

To the armature I) is clamped a light bar, d', to the opposite ends of which the links d are hinged. Tliese links connect with the ends of clamping plates or bars E E', of ordinarymay be raised.

construction, and serve to tilt the clamps when the armature is raised. The ends of the clamps E E' rest upon the plate (l, or are provided with adjustable stops or serews c c'.

lt lt' are two parallel carbon-carricrs, controlled by the above-describcd clamps.

F is an electro magnet, the coils ofwhich are ina norinally-open circuit. lt is arranged with its poles downward and fixed between the free ends of the clamps.

H is an iron block, ser'ving as an armature to magnet F, and forming` part of or otherwise connected with a pivoted lever, L. Said lcver is formed with wedge-shapcd enlargcments h h' on its ends, which are forced under one or the other of the stops 8 c' as theleveris swung on its pivot, and by this means either clamp Magnet F is wound with an insnlated wire that is connected to the negative lamp-terminal at one end and to an insulatcd metal eollar or stop. V, suitably secured to the top of a frame, VI.

On carbon-carrier R is a fixed or adjustable stop or collar, VV, which is to be placed at such a point that it may come in contact with collar V and arrest the descent of the earrier when the carbon carried thereby has been nearly consumed.

Un carrier R' is an adjustablc collar, G, with` the edge of which a weightedcatch, G, pivotcd to the lamp-frame, is arranged to engage. The lever G, forming the catch, extends up through the plate O as an arm, g, which lies in the path of inovement of a projection, K, on lever L. A binding-screw, g', properly set in an arm clamped to plate G, is employed to limit the movcment of arm g in one direction.

The operation of the above-described devices is as follows: The lamp being provided with carbons, the earrier lt' is raised and sustained by the catch G. The lever L is shifted to bring the enlarged end h' under the screw c' on clamp E'. ln this condition the current will pass through the set of carbons of which the upper one is connected to earrier It, and these will be consumed, the armature D' having` only to sustain the weight of carrier R. Vfhen this latter has descended sufliciently to bring the stop W into contact with collar V a portion of the current is directed through the coils of magnet lt, the effect of which is to shii't the lever L, thus lowering clamp E' into position, to be affected by the movement of the armatnre D', and releasing the earrier lt' from the catch G. At the same time clamp E is raised by cnlargement li, so that the armature D' has now the weight of carrier lt' only to sustain,

The coils of magnet F or the circuit in which the same are included should be of very high resistance, so that when the second set of carbons is brought into circuit only a very small portion of the current will flow through the coils of F. Provision may be mate for disrupting the circuit through the magnet F after it has performed its allotted functions, if so desired, the leverL forming a convenientmeans of effecting this in several well-known ways.

The principles of construction and operation involvcd in the above are evidcntly attained in many variations in the specific Character of the mechanism employed. I have made use of a specified form of lamp in illus rating the nature of the invention claimed, but I regard the same as applicable to many others.

That I claim as of my invcntion, without reference to the specific character of the regulating mechanism with which the same is or may he combined, is-

1. In an electric lamp containing two sets of carbons, the combination, with the electromagnet, of independent feed mechanisms, one for each set of earbons, a pivoted armaturelever adapted to be shifted to maintain either of said feed mcchanisms out of operation, and an electro-;nagnet independent of the feedmagnets, arranged to shiftthe said lever, for the purposc et' bringing` into operation the second set of carbons when the first has been consumed, substantially in the manner described.

2. In an electric lamp containing one set of feed-controlling magnets and two sets of carbons, the combination, with the rcmovable armature, oftwo independently-conneeted clutch mechanisms, one for each set of carbons, a pivoted armature-lever adapted to be shifted to raise the free end of either of the said clutch mechanisms, and an independent electro-magnet for shifting` the lever, substantially in the manner described.

3. In an electric lamp eontaining two sets of carbons and independent feed mechanisms therefor, the combination, with one ot'said sets, of mechanism for maintaining the same inactive and out of circuit, an electro-magnet in a normally-open branch circuit for bringing the same into action, and a stop or equivalent on the carrier of the other set, arranged to close the branch circuit through the magnet when the said carrier has descended a predetermined (listanee, substantially as set forth.

4-. fu an electric lamp containing two sets ofcarbons, as described, the combination, with the clamps or clutch mechanisms, of devices for maintaining the free cnds in a slightly-clevatcd position, for the purpose of keeping them out of engagement with the carbon-carricrs, as set forthu 5. The combination, with the armature D', elamps E E', and carbon-carriers controlled thereby, of armature-lever L, having beveled enlargements h hl, substantially as and for the purpose set forth.

6. The combination, with a carbon-carrier, as R', in a lamp containing two sets of carbons, of an adj ustable collar, g, and a pivoted sustaining hook or catch, G, having an arm, g, extending into the path of movemcntof the shifting mechanism, as and for the purpose set forth.

IOO

7. The combination, with the armatura D', In testimony whereof I have hereunto set my elamps E E', and earbon-carriers R R', of level' hand this 20th day of January, 1882.

L havinff beveled enlargements hh' and arm m I, an elztro-magnet, F, for shift'in the posi- EDWARD WESLON' 5 tion of the lever, and a weighted catch, G, ar- Witnesses:

ran ged to be tipped by arm k, all snbstantially M. J. DEWITT,

as set; forth. J. P. DENGLER. 

